3M 6291 & 6391 HEPA Mask

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3M 6291 & 6391 HEPA Respirators

3M 6291 HEPA Respirators are Proudly Made in the USAYou can finally do your yard work without suffering through all of your allergy symptoms! Economical and efficient, this mask seals tightly around the face and provides true HEPA filtration to block out dust, mold, and pollen. Do chores inside or out with the protection you need to breathe clean air. Adjustable, latex-free straps allow you to customize the fit of this mask. The body of the the mask is easily cleaned with mild soap and water. Replacement 2091 filters can be purchased as often as you need them.

The P100 rating of the 3M 2091 filters exceeds the CDC's recommended N95 rating as an effective way to block the spread of pathogens like the Avian Flu, SARS and other influenza strains. By blocking 99.97% of particles, this P100 classification makes this respirator ideal for working with toxic & non-toxic particles, as well as oil based aerosols.

NOTE: 3M recently began printing manufacture dates on the filter packs for these masks. These are not expiration dates. Mask filters are good for use up to five years FROM the date stamped on the packaging.

3M Mask Sizing
Mask measurements are made from the top of the mask to the bottom of the chin.
6291 - 4.75"
6391 - 5"

3M HEPA Respirators Video

Product Reviews & Questions

Write A Review | Read all 60 reviews.
  heart saver
Reviewed by: able to farm from New York

im a heart transplant patient and this help when I am out getting in hay on the farm
  Great mask
Reviewed by: Allergy Sufferer from Oklahoms

I use the mask when I mow my yard. It works great!
  No review title given
Reviewed by: Allen Mayeske a allergie suffer for years. from Newton Kandahar

The greatest allergy mask ever made.

Customer Q & A

Q1: I'm going to be using the mask to clean out a shed with rodent pings. What is included with the mask? Does it come with the filters and cartridges or do I need to buy them separately?

A: This respirator comes with the mask as well as two of the HEPA rated P100 filters the big pink round ones. If you wanted something for odors/fumes, the Multi Gas cartridges are sold separately and would be used instead of the included P100 filters.

Q2: Which of your masks best filters out scents like laundry detergents, perfumes, smoke, as well as VOC's, paint fumes, etc? PLEASE HELP ME FIND THE RIGHT MASK. The "I can Breathe" masks do not provide enough filtration. Thank you sooooooo much.

A: Two options. In terms of filtering the pollutants you described, some people will double up the carbon filters in the ICanBreathe masks. This will reduce airflow, but it is something some of our customers do. And, if the ICanBreathe isn't filtering as much as you'd like, then the Respro, in terms of smoke, fragrances, etc. won't be too much better. So that leaves the 6291. Out of the package, it won't capture as much as you'd like. While it will filter some fragrance and smoke particles, the HEPA filters are best designed for particulate. However, add the MultiGas cartridges and this should work for you. These cartridges use a thicker bed of filter media to adsorb odors, fragrances, etc. than any of the other masks we offer. I've used this mask with these, and unless someone is literally blowing cigarette right into the filter, right beside your face, it does a great job of removing odors, fragrances and smoke. Hope that helps!

Q3: How do you know when its time to change the hepa filters?

A: A couple ways. First, how long have you used the filter? Typically, they provide 50-60 hours of use. This will vary though, depending on your specific conditions of use. Second, have you experienced "breakthrough"? This is when the filter has been compromised and particulate is passing through. Depending how you're using it, you may taste, smell or even feel if the filter is no longer performing as it once did. Lastly, is it more difficult to breathe through? A noticeable difference in breathability new vs. now is generally a good indicator that the filter needs to be replaced. Now, if you only use the mask very sporadically, say all day but only a few times per year, the filters will generally last you a few years before needing to be replaced. However, this is going to remain true only if you're sealing the mask up between uses or at least storing it in a clean, dry location reduces any chances of mold .

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3M HEPA Respirator Review

3M 6291 HEPA Mask

The 3M 6291 HEPA Mask is one my favorite face masks. Unlike disposable masks, the 6291 is durable and can be used repeatedly. I have owned this mask for a several years, and have changed the HEPA filter cartridges twice. I use this mask for just about everything from yard work to more heavy duty projects like like replacing the grout in our shower. Depending on usage, you may have to replace the filters more often, so this will vary depending on use. After several years of service, this my assessment of the 6291 respirator.

What I like about the 3M 6291 HEPA Mask
  • Offers HEPA quality filtration of oil and non-oil based particles
  • Versatile filtration ideal for a wide range of uses from pollen and mold particles while raking leaves to filtering oil based particles you might encounter while staining or working with wood or fiberglass while renovating or working on your home
  • Creates a very tight seal
  • It is durable and easy to clean after dirty projects - rinse respirator itself with warm water or with a mild detergent (filters NOT washable)
  • Fits very snugly with two straps and is fully adjustable
  • Latex free
  • Two sizes available
  • MultiGas or Organic Vapor cartridges optional
  • Made in the USA
What I did not like about the 3M 6291 HEPA Mask
  • As with any tight sealing mask, in warm conditions it will make the area around my mouth sweat, so some moisture will get trapped inside

In all, the 3M 6291 HEPA Mask is the best masks we offer. With NIOSH P100 filtration, this respirator is one of the most versatile available today. It is completely sealed, non latex, HEPA grade, and you can replace the filters when necessary. If you, have allergies, do a lot of yard work, work in a shop or in places where things toxic and non-toxic particles are a concern, I strongly suggest using this mask. The filtration this mask provides also exceeds the CDC's recommended filtration level (N95) to help prevent the spread of the influenza virus. Aside from it being a little warm with extended use or in warm conditions, there is very little not to like about this durable HEPA respirator.

Could not wait to try Safeguard Window Filters. I am using them, am very pleased and have high hopes that my solution to open windows is at hand!
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Additional Resources

3M Respirator/Mask Fit Check/Test    3M Respirator Fit Test
Compare Masks
Mask Buying Guide
Mask FAQ
Mask Replacement Filters


Discount 6391 HEPA Respirator
3M 6291 HEPA - Medium (Item#: 3M0001) $22.99
3M 6391 HEPA - Large (Item#: 3M0001-L) $22.99

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